210221229 has 8 divisors (see below), whose sum is σ = 280361952. Its totient is φ = 140114000.

The previous prime is 210221191. The next prime is 210221233. The reversal of 210221229 is 922122012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210221229 - 2⁷ = 210221101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20479 + ... + 28979.

It is an arithmetic number, because the mean of its divisors is an integer number (35045244).

Almost surely, 2^210221229 is an apocalyptic number.

It is an amenable number.

210221229 is a deficient number, since it is larger than the sum of its proper divisors (70140723).

210221229 is an equidigital number, since it uses as much as digits as its factorization.

210221229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16747.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 210221229 is about 14499.0078626091. The cubic root of 210221229 is about 594.6008470889.

The spelling of 210221229 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred twenty-nine".